Bi-jukujo: Suki mo no shikijô kyô

Original title: 美熟女 好きもの色情狂

Chika is an office worker who is dating married man Kenji Okamoto. Kenji is in a hurry to divorce his wife so that he can remarry her. Kenji desperately wants to have sex with Chika, but he has to wait until they are married. However, Chika, who plays the role of a submissive woman during the day, turns into a nymphomaniac and becomes a promiscuous woman after work.